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Whether you are dual-booting your Mac or formatting a new PC, the best way to get Windows 10 is through a fresh installation, not an upgrade. But you’ll need to create a bootable Windows 10 USB drive first. The process is a little more complicated if you’re using a Mac.

Microsoft offers a simple tool to create a bootable USB on Windows, but there is no such tool for Mac users. Fortunately the process is pretty easy, if you know how.